Thanks to all who replied. There was a consensus for juvenile
Yellow-rumped Warbler. This was my wife Tina's guess as well, but we
were unable to find photos of juvies anywhere in our books or online.

Happy birding,

Marc Hoffman
Kirkland, WA
http://www.SongbirdPhoto.com


>From: Brett Wolfe <m_lincolnii at yahoo.com>
>Reply-To: Brett Wolfe <m_lincolnii at yahoo.com>
>Subject: Re: [Tweeters] Bird ID Assistance?
>To: Marc Hoffman <tweeters at dartfrogmedia.com>
>
>Excellent photos! Most of my stuff is packed but those look like
>shots of a juvenile Yellow-rumped Warbler (YRWA). The fuzziness of
>the feathers, the yellow corners on the beak both suggest juvenile.
>The overall lack of coloration but the tell-tale white undertail
>feathers and overall pattern on top definitely point me towards
>YRWA. Be curious what others think (for some reason I can't post to
>tweeters anymore).
>
>Brett A. Wolfe
>Seattle, WA
>
>
>From: Marc Hoffman <tweeters at dartfrogmedia.com>
>To: tweeters at u.washington.edu
>Sent: Tuesday, May 29, 2012 7:09 PM
>Subject: [Tweeters] Bird ID Assistance?
>
>Hi Tweets,
>
>I could use some help with a bird ID.
>
>While walking the East Snoqualmie Valley Trail near Stillwater
>today, Tina Blade and I saw a pair of gray, black and white birds we
>could not identify--possibly warblers or vireos? They were seen in
>the tops of 10-15-foot willows, from the vantage point of a bridge
>so that they were about eye level.
>
>Here are two photos, both of the same individual though both birds
>looked similar if not identical:
>http://songbirdphoto.com/images/mysteryWarbler_20120529_IMG_9563.jpg
><http://songbirdphoto.com/images/mysteryWarbler_20120529_IMG_9558.jpg>http://songbirdphoto.com/images/mysteryWarbler_20120529_IMG_9558.jpg
>
>
>Marc Hoffman
>Kirkland, WA
><http://www.songbirdphoto.com/>http://www.SongbirdPhoto.com
>mailto: tweeters at dartfrogmedia dot com